What is a gene?
a. a section of a protein that codes for dna
b. the alternate version of a trait
c. the visible trait in the f1 generation
d. a section of dna that codes for a specific trait
think its d but i'm not sure..

a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.

D is correct!

The answer is joseph is observing the colour of the reaction mixture to see whether proteins are present in the given solution.

The return of the wolf to yellowstone national park will probably affect the bird population to some degree, not significantly. while wolves will hunt birds when necessary, they prefer to hunt larger prey. the bird population will most likely only be affected when hunting is scarce for the wolves. birds of prey will also probably not be affected as much as other birds who spend more time on the ground hunting for food as the tend to spend more time in the air or in trees since they do not need to stay on the ground for long due to the nature of the way they hunt.